JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li id="li-1">1</li>
    <li id="li-2">2</li>
    <li id="li-3">3</li>
    <li id="li-4">4</li>
    <li id="li-5">5</li>
</ul>

JavaScript

var newItems = [
    [document.getElementById('li-1'), document.getElementById('li-2')],
    [document.getElementById('li-3'), document.getElementById('li-4')],
    [document.getElementById('li-5')]
];

$([].concat.apply([], newItems)).on('click', function() {
    console.log(this.id);
});